<template>
  <div class="app-container">

    <!-- 查询和其他操作 -->
    <div class="filter-container">
      <el-input v-model="listQuery.tableNo" clearable class="filter-item" style="width: 200px;" placeholder="请输入餐桌号" />
      <el-button v-permission="['GET /admin/qrcode/list']" class="filter-item" type="primary" icon="el-icon-search" @click="handleFilter">查找</el-button>
      <el-button v-permission="['POST /admin/qrcode/create']" class="filter-item" type="primary" icon="el-icon-edit" @click="handleCreate">添加</el-button>
    </div>

    <!-- 查询结果 -->
    <el-table v-loading="listLoading" :data="list" element-loading-text="正在查询中。。。" border fit highlight-current-row>
      <el-table-column align="center" label="编号" prop="id" sortable />

      <el-table-column align="center" label="餐桌号" prop="tableNo" />

      <el-table-column align="center" label="大小" prop="imgSize" />

      <el-table-column align="center" label="二维码" prop="picUrl">
        <template slot-scope="scope">
          <img id="imgWrapper" v-if="scope.row.picBlob" :src="'data:image/jpeg;base64,'+scope.row.picBlob" width="40">
        </template>
      </el-table-column>

      <el-table-column align="center" label="协议" prop="httpTcp" />

      <el-table-column align="center" label="操作" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button :loading="downloadLoading" size="mini" type="primary" icon="el-icon-download" @click="handleDownload(scope.row)">导出</el-button>
          <el-button v-permission="['POST /admin/qrcode/update']" type="primary" size="mini" @click="handleUpdate(scope.row)">编辑</el-button>
          <el-button v-permission="['POST /admin/qrcode/delete']" type="danger" size="mini" @click="handleDelete(scope.row)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination v-show="total>0" :total="total" :page.sync="listQuery.page" :limit.sync="listQuery.limit" @pagination="getList" />

    <!-- 添加或修改对话框 -->
    <el-dialog :title="textMap[dialogStatus]" :visible.sync="dialogFormVisible">
      <el-form ref="dataForm" :rules="rules" :model="dataForm" status-icon label-position="left" label-width="100px" style="width: 400px; margin-left:50px;">
        <el-form-item label="餐桌号:" prop="tableNo">
          <el-input v-model="dataForm.tableNo" placeholder="请输入餐桌号"/>
        </el-form-item>
        <el-form-item label="跳转规则:" prop="httpTcp">
          <el-input v-model="dataForm.httpTcp" placeholder="小程序后台配置的二维码跳转小程序规则"/>
        </el-form-item>
        <el-form-item label="尺寸大小:" prop="imgSize">
          <el-input v-model="dataForm.imgSize" placeholder="请输入1-9999数字,不输入则默认为100"/>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible = false">取消</el-button>
        <el-button v-if="dialogStatus=='create'" type="primary" @click="createData">确定</el-button>
        <el-button v-else type="primary" @click="updateData">确定</el-button>
      </div>
    </el-dialog>

  </div>
</template>

<style>
.qrcode-uploader .el-upload {
  border: 1px dashed #d9d9d9;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.qrcode-uploader .el-upload:hover {
  border-color: #20a0ff;
}
.qrcode-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 120px;
  height: 120px;
  line-height: 120px;
  text-align: center;
}
.qrcode {
  width: 145px;
  height: 145px;
  display: block;
}
</style>

<script>
import { listQrcode, createQrcode, deleteQrcode , updateQrcode } from '@/api/qrcode'
import { getToken } from '@/utils/auth'
import Pagination from '@/components/Pagination' // Secondary package based on el-pagination

export default {
  name: 'Qrcode',
  components: { Pagination },
  data() {
    return {
      list: null,
      total: 0,
      roleOptions: null,
      listLoading: true,
      listQuery: {
        page: 1,
        limit: 20,
        sort: 'add_time',
        order: 'desc'
      },
      dialogFormVisible: false,
      dialogStatus: '',
      textMap: {
        update: '编辑',
        create: '创建'
      },
      dataForm: {
        tableNo: undefined,
        httpTcp: undefined,
        imgSize: undefined,
      },
      rules: {
        tableNo: [{ required: true, message: '桌号不能为空', trigger: 'blur' }],
        httpTcp: [{ required: true, message: '协议不能为空', trigger: 'blur' }],
      },
      downloadLoading: false
    }
  },


  created() {
    this.getList()
  },
  methods: {
    getList() {
      this.listLoading = true
      listQrcode(this.listQuery).then(response => {
        this.list = response.data.data.list
        this.total = response.data.data.total
        this.listLoading = false
      }).catch(() => {
        this.list = []
        this.total = 0
        this.listLoading = false
      })
    },
    handleFilter() {
      this.listQuery.page = 1
      this.getList()
    },
    resetForm() {
      this.dataForm = {
        tableNo: undefined,
        httpTcp: undefined,
        imgSize: undefined,
      }
    },

    handleCreate() {
      this.resetForm()
      this.dialogStatus = 'create'
      this.dialogFormVisible = true
      this.$nextTick(() => {
        this.$refs['dataForm'].clearValidate()
      })
    },

    createData() {
      this.$refs['dataForm'].validate(valid => {
        if (valid) {
          createQrcode(this.dataForm)
            .then(response => {
              this.list.unshift(response.data.data)
              this.dialogFormVisible = false
              this.$notify.success({
                title: '成功',
                message: '添加二维码成功'
              })
            })
            .catch(response => {
              this.$notify.error({
                title: '失败',
                message: response.data.errmsg
              })
            })
        }
      })
    },

    handleUpdate(row) {
      this.dataForm = Object.assign({}, row)
      this.dialogStatus = 'update'
      this.dialogFormVisible = true
      this.$nextTick(() => {
        this.$refs['dataForm'].clearValidate()
      })
    },

    updateData() {
      this.$refs['dataForm'].validate(valid => {
        if (valid) {
          updateQrcode(this.dataForm)
            .then(response => {
              for (const v of this.list) {
                if (v.id === this.dataForm.id) {
                  const index = this.list.indexOf(v)
                  this.list.splice(index, 1, response.data.data)
                  break
                }
              }
              this.dialogFormVisible = false
              this.$notify.success({
                title: '成功',
                message: '更新二维码成功'
              })
            })
            .catch(response => {
              this.$notify.error({
                title: '失败',
                message: response.data.errmsg
              })
            })
        }
      })
    },

    handleDelete(row) {
      this.$confirm('确定删除?', '警告', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning',
        center: true
      }).then(() => {
        deleteQrcode(row).then(response => {
          this.$notify.success({
            title: '成功',
            message: '二维码删除成功'
          })
          this.getList()
        })
        .catch(response => {
          this.$notify.error({
            title: '失败',
            message: response.data.errmsg
          })
        })
      }).catch(() => {})
    },

    //保存二维码到本地
    handleDownload(row){
      var a = document.createElement("a"); // 生成一个a元素
      var event = new MouseEvent("click"); // 创建一个单击事件
      a.download = row.tableNo || "photo"; // 设置图片名称
      a.href = 'data:image/jpeg;base64,'+row.picBlob; // 将生成的URL设置为a.href属性
      a.dispatchEvent(event); // 触发a的单击事件
    }
  }
}
</script>
